Alke Global-8 Series User And Installation Manual - Page 7
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Store the gas cylinders always on ground level in a well-ventilated place, preferably outside the room
where the heater is. In case the gas cylinder is placed in a cylinder housing, or cover, make sure that
there is enough ventilation as requested by the applicable regulations or standards. Never obstruct these
ventilation holes. Make sure that the gas cylinders are used in upright position only and are secured
again tipping over during use. Gas cylinders laying on their side will give liquid gas. This is very
dangerous and will give a fire ball when it reaches the heaters.
In case the gas cylinder is placed in the same room as the heater is, keep it at a safe distance from the
heater so it will not be over heated. Advisable is at least 2 meters. Make sure that the gas cylinder valve
can easily be reached to close the gas supply in an emergency situation. Pay special attention how to
change the gas cylinders in a safe way.
For the Global-5 a minimum of 1,5 gas cylinder (11 kg or larger) per heater is needed. For the Global-8
a minimum of 2 gas cylinders (11 kg or larger) per heater are needed for a guaranteed gas supply. For
a 45 kg gas cylinder a maximum of two Global-5 heaters is recommended. Having more heaters on the
gas cylinders as recommended above will give gas capacity problems, especially when it becomes
colder, due to limited vaporisation of the gas.
Biogas
While biogas can be corrosive under certain conditions it is important that the biogas is clean before
entrance to the appliances. The gas shall be dry and free from dust, oily and greasy particles to avoid
internal blockage of the appliances. Also halogens, chlorides, H2S and NH3 shall be removed to avoid
corrosion. The tolerance on biogas composition with CH4=60% is +/- 4% CH4.
Gas hose
In most installations the heaters are not connected directly to the gas system but a gas hose is used.
Keep the hoses always as short as possible, especially for natural gas and low pressure LPG. For high
pressure LPG the maximum length (concerning capacity issues) is 5 meter.
The gas hoses must be inspected frequently and must be changed within the prescribed intervals. Check
the hose at least every 6 weeks. Avoid twisting or stress of the gas hose. Twisting or stress will shorten
the live time of the gas hose. During inspection, check the hose for damage, splitting, ageing and
cracking. Pay special attention to the connections. If a defect is seen directly change the gas hose by a
new one of the same type. Keep the hoses clean from dirt, moisture and dust.
Some countries have regulations that gas hoses must be replaced every 2 or 3 years. Please check with
your gas supplier. Always use official approved gas hoses, suitable for the pressure concerning. Replace
a gas hose always by a type of the same length, internal diameter and equivalent quality. For safety
reasons: never use air hoses or water hoses, these are very dangerous for gas transportation and will
leak soon!
The gas hose shall always be connected to the heater with the help of hose clips. Not using hose clips
at both ends of the gas hose is very dangerous. Make sure that the gas hose never is heated above 40
degrees Celsius.
Changing gas cylinders
In case gas cylinders are used, changing or connecting gas cylinders must be done preferably outside,
or in a well-ventilated area, in a flame-free environment and away from other people.
•
Check if there are no other operating heaters, other gas heaters, burning candles or people smoking
cigarettes in the area.
•
Be sure that the valve on the gas cylinder is closed and the burner of the heater is extinguished.
•
Unscrew the nut by which the gas regulator is connected to the gas cylinder valve. (Note that most
connections are with left-handed threads. They open in clockwise direction).
•
Before connecting the (new) gas cylinder, first check if the rubber seals on the cylinder valve or on
the regulator connecting nut are fitted properly and able to fulfil its function and are not damaged or
worn. If the last case is true, do not use it and replace the seals first.
•
After connecting the regulator firmly, open the cylinder valve and check with soapy water if the
connection is leak tight. If bubbles appear, the connection leaks. Do not use the heater unless the
system is sound.
Version: April 2016
7
manual number: 0009 0440EN